Bead plate



L. O. GRANGE March A15, 1932.

BEAD PLATE 'Filed April ze, 195o p6 ze Y 40 heat insulating means surrounding the coil.

Patented Mar. 15, 71932".

:LEO o. "GRANGE, Y or CHICAGO,

ILLINoIsAssIGNoR ro WALTER r.- JAnRArr-,ior oHIGAGaILLINors i, l

BEAD :PLATE Application fiea Aprn 26,'

VMy invention relates generally'to vulcan# izing devices and has for one particular application the provision of a bead plate applicable for use with vulcanizingy devices for vulcanizing tire casings. One object isthe provision of such a plate which shall be strong and light, and which shall minimize the loss of heat through thevplate. Another object is the provision of a bead plate the mostl perishable portion of which shall be sepa-` rately renewable. Other objects will appear from time to time in the course of the specification and claims. y I illustrate my invention more or less dia- A grammatically in the accompanying draw#V ings, whereinv Figure l is a plan view; Figure 2 is a section on the line 2-2 .of Figure l Figure 3 is a section on the line 3 3 of Figure 2; and Y Figure 4 is a transverse section illustrating the bead plate in use. p Likeparts are indicated by like symbols throughout the specification and drawings.

Referring to the drawings, A generally indicates any suitable housing associated with which is the inner member or form wall A1. l lThe space between the walls A and A1 may 3 0 be filled for example by a liquid A2. I may for example employ a liquid the boiling point .of which is higher than the temperature to which the liquid is subjected, and higher than the temperature necessary for vulcanizing, whereby risk of explosion is avoided;

B indicates anyV suitable means, herein shown as an electric resistance for applying heat to the liquid A2. B1 indicates the actu-l ating circuit and B2 any suitable electric and Positioned within the cavity of the wall A1 is any suitable shell or form C, conforming to the tread kof the tire to be treated. C1 indi cates a tire in course of treatment and Cz'any suitable inner pack tube or filler, adapted .to maintain the casing in inflated condition during treatment, and in close contact with the inner surface of the member (I C3` indicates any suitable clamp secured' to the member A for e-Xamplby the bolts C* with y twee-nk D and D5.

the parts.

' rather than 19370. serial No. 447,54o.

the lock nuts C5. G6 indicates a pressure memberor screw, screwthreaded throughthe, yoke C3 and 'in association lwithfapressure 'applying plateCh-j l i v Inter-posed between the casing@y and the 55 'i order that the two sections may mate Imay y provide pins D? Vadapted 'topenetrate lapenl tures D3. l D4 D4 are the bead engaging meml65 bers proper, each having a broadupper portionrD5 which may be secured to the bottom Vofthe plate D,l as by the screwsDG. It will be seen from Figures'S and 4: that the heat ing sulating layenor member D7 is interposed be-` 70 It will also be seen that f the'flat outer sidel Ds ot the member D, which engagesthe inner face of the .upper portion of the cavity A1, extends'. outwardly somewhat beyond the edge of theplate D.y It willthus be seen that the platel) is entirely out of contact with they Wall A1. 4It .will be observed, asin Figuresl and 2, that the screws DG pass through elongated laperturesV y. or slots D10,` topermitrelative expansion of `It will be realized that whereas Ihave des Y scribed and shown a practical and operative Y device, nevertheless' manychangesmight be Y made in the size, shape, number and disposi- 8.5 tion ofA parts without. departing from the spiritfof myinvention, I' therefore wishl my description and drawings to be takenvas'in a broadsense illustrative and diagrammatic 96 as limi'tingfme to kmy specific showing.` j v y v fjForeXampleitlwill be understood thatVv whereas I have shown lpins D2 mating inH V'apertures D3 to secure'the two halves togeth' 95 er, I may employ any other suitable secur.- f

ingpmeans, or may, desired, employonsVI V whole insteadoftwo halves, andI dov-not wish l tobelimited specifically to the employmentv The use and operation of my invention are as follows:

In vulcanizing tire casings it is important that the heat be applied to the part to be vulcanized, and that the loss of heat be reduced to a minimum. This is important, since a substantial proportion of the cost of such vulcanizing operation is the cost. of the power consu1ned. Also, a conservationV of heat makes for a more rapid 'vulcanizatiom thus increasing the total output or capacity of a vulcanizing device, a fact of importance in a busy plant. In order to reduce the loss through the bead plate to a minimum I divide the bea-d plate intothe upper portion D and the lower portion D4. The upper portion D has no heating function and merely serves to draw olf heat from the heating portion D4, which does apply heat adjacent the bead of the tire, in some cases.' In other words, where the tread only is being treated, the bead plate itself may have either merely a secondary heating function, or no heating function at all. In either case it isimport'a-ntto limit the transfer or escape of heat from the wall A1 through the bead plate and through the clamping means. I-Ience the importance of insulating the portion D4 D5 of the bead plate from the plate properD. For the same reason, and to Veect theescape of heatthrough the plate D, the plate D itself is so formed or so positioned in relation to the member DAx D5 as to avoid contact with the wall A1.. VIhis will be clear from Figures ff, 3 and t. Further, to prevent the transmis sion of heat from the plate D to the clamping means, and also, to lighten the plate and save metal, I employ the upwardly projecting abutment and reinforcing flanges D1. It will be seen, as in Figure Ll, that the pressure applying plate C7 does not engage the plate D proper, but only the upper edges, rounded olf at that, of the flanges D1. Thus the transfer of heat through and from the plate D is reduced to a minimum.

A further advantage in employing the plateof separable portions, rests in the fact that while the upper plate portion-D has an almost indeiinite life, the sharp edge of the portion Di is easily. broken, battered and bent. Vhen the edge is badly chippedor broken, the bead plate becomes unusable. Tere the bead plate formed as a unit, it would then be necessary to throw away the entire plate. vIn employing my invention, only the portion Dt D5 need be thrown away, and. a corresponding newV member can be quickly and easily applied. The result is a very substantial saving to the operator.

The fuel saving feature, resulting from the reduction of heat losses, becomes particularly important in connection with wide cavity vulcaniz'ers, asforlarge bus tires; Itl will be understood that the beadplate is applicable to vulcanizers inl which a Afuel is used, as well as to those in which electricity is employed, and I do not wish to be limited to its use with any particular heating means.

I claim:

l. For use with a vulcanizer for tire casings, a bead plate which includes a side element adapted to engage the exterior of the casing adjacent the bead, a top element adapted for the application of pressure to the casing, said elements being separable, means for securing them together, and heat insulating means interposed between them.

2.V The structure of claim l characterized in that the edge of that portion of the top element which overlies'the side element is set baclr from lthe outer edge of the side element.

8. The structure of claim l characterized in that the top element includes` a lower relatively thin portion, and a plurality of flanges upstanding` therefrom. l

Y Signed at Chicago, county of Cook, and State of Illinois, this 17 th day of April, 1930.

LEO O. GrRAlIGrEv 

